Size and weight is a big decision factor when you are trying to find the ideal camera for your needs.
In this section, We are going to illustrate Nikon L31 and Nikon S8100 side-by-side from the front, back and top in their relative dimensions. Nikon L31 has external dimensions of 96 x 59 x 29 mm (3.78 x 2.32 x 1.14″) and weighs 160 g (0.35 lb / 5.64 oz) (including batteries). Nikon S8100 has external dimensions of 104 x 60 x 30 mm (4.09 x 2.36 x 1.18″) and weighs 180 g (0.40 lb / 6.35 oz) (including batteries).
Below you can see the front view size comparison of Nikon L31 and Nikon S8100. Nikon L31 is clearly the smaller of the two cameras. Its body is 8mm narrower, 1mm shorter and 1mm thinner than Nikon S8100.
Here is the back view size comparison of Nikon L31 and Nikon S8100.
Now lets look at the top view comparison of Nikon L31 and Nikon S8100.
Weight is another important factor especially when deciding on a camera that you want to carry with you all day.
Nikon L31 is 20g lighter than the Nikon S8100 but we don't think this will make a significant difference.
Unfortunately neither Nikon Coolpix L31 nor Nikon Coolpix S8100 provides any type of weather sealing in their body, so you have to give extra care especially when you are shooting outdoors. If weather sealing is a must-have feature for you, check these sections: Top Compact Cameras with Weather Sealing
LCD Screen Size and Features
Nikon S8100's 3" LCD screen is slightly larger than Nikon L31's 2.7" screen.
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.